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Method for preparing self-healing composite material by employing electrospinning method

A composite material and electrospinning technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve problems such as complex chemical reactions, large microcapsule or fiber size, difficult operation, etc., and achieve uniform diameter distribution and complete fiber structure , The effect of simple preparation process

Active Publication Date: 2015-04-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of common self-healing materials is still relatively cumbersome, the operation is relatively difficult, and even involves complex chemical reactions, and the production cost is relatively high.
The most important thing is that the prepared microcapsules or fibers with self-healing function are too large in size, which reduces the mechanical properties of the composite material

Method used

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  • Method for preparing self-healing composite material by employing electrospinning method
  • Method for preparing self-healing composite material by employing electrospinning method
  • Method for preparing self-healing composite material by employing electrospinning method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1, the preparation of self-healing composite fiber 1

[0030] 1) Add 5 g of polystyrene (molecular weight: 250,000) into 20 g of DMF, and mechanically stir until the solution is transparent, thereby obtaining a homogeneous solution with a mass ratio of polystyrene to DMF of 5 / 20. The liquid epoxy resin (epoxy resin RIM135) that takes by weighing 3g joins in the polystyrene solution of above-mentioned gained, mechanically stirs, obtains the mixed solution of polystyrene and RIM135, i.e. electrospinning solution; Wherein the RIM135 and The mass ratio of polystyrene is about 36 / 60;

[0031] The prepared blend solution of RIM135 and polystyrene was filled into the liquid storage device, a spinning voltage of 20KV was applied between the spinning needle and the receiving device, and the spinning distance between the spinning needle and the receiving aluminum foil was controlled to be 13cm. The flow rate of the blended solution of the polymer and the healing agent w...

Embodiment 2

[0039] Embodiment 2, the preparation of self-healing composite fiber 2

[0040] 1) Add 5 g of polyacrylonitrile (molecular weight: 150,000) into 95 g of DMF, and mechanically stir until the solution is transparent, thereby obtaining a homogeneous solution with a mass ratio of polyacrylonitrile to DMF of 5 / 95. Weigh 3g of p-tert-butylphenyl 1-(2,3-epoxy) propyl ether and add it to the polyacrylonitrile solution obtained above, and stir mechanically to obtain polyacrylonitrile and p-tert-butylphenyl 1 -(2,3-epoxy) propyl ether mixed solution, namely to get the electrospinning solution; wherein the added p-tert-butylphenyl 1-(2,3-epoxy) propyl ether and polyacrylonitrile The mass ratio is 36 / 60.

[0041] The blended solution of polyacrylonitrile and p-tert-butylphenyl 1-(2,3-epoxy) propyl ether is loaded into the liquid storage device, and 20KV spinning is applied between the spinning needle and the receiving device. Voltage, control the spinning distance between the spinning n...

Embodiment 3

[0045] Embodiment 3, preparation of self-healing composite fiber 3

[0046] 1) Add 5 g of polystyrene (molecular weight: 250,000) into 12 g of DMF, and stir mechanically until the solution is transparent, thereby obtaining a homogeneous solution with a mass ratio of polystyrene to DMF of 5 / 12. Weigh 3g of p-tert-butylphenyl 1-(2,3-epoxy) propyl ether and add it to the polystyrene solution obtained above, and stir mechanically to obtain polystyrene and p-tert-butylphenyl 1 -(2,3-epoxy) propyl ether mixed solution, which is the electrospinning solution; p-tert-butylphenyl 1-(2,3-epoxy) propyl ether and polystyrene added The mass ratio is 36 / 60;

[0047] The blended spinning solution of the prepared polystyrene and p-tert-butylphenyl 1-(2,3-epoxy) propyl ether is loaded into the liquid storage device, and 20KV spinning is applied between the spinning needle and the receiving device. Filament voltage, control the spinning distance between the spinning needle and the receiving al...

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Abstract

The invention provides a method for preparing a self-healing composite material by employing an electrospinning method. The method comprises the following steps: dissolving a spinnable polymer and a liquid healing agent into a volatile solvent, carrying out electrospinning, and curing the obtained spinnable polymer / healing agent composite fiber with a curing agent dilute solution at a room temperature, so as to obtain the spinnable polymer / healing agent composite fiber with a shell layer on the surface; dissolving the spinnable polymer and a curing agent into the volatile solvent, and carrying out electrostatic spinning, so as to obtain the spinnable polymer / healing agent composite fiber; stacking two composite fibers to form a fiber film; pouring a curable resin material; and repeatedly paving the film, pouring resin, and curing, so as to obtain the self-healing composite material; when the composite material generates a micro-crack, the internal fiber cracks; and the healing agent blocked in a fiber micropore and the curing agent blocked in another fiber micropore are released on the crack part and react under the heated condition, thus achieving self-healing, so that the material can become a self-repairing artificial material with an application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, and in particular relates to a method for preparing self-healing composite materials by using an electrospinning method. Background technique [0002] Polymer materials and their composite materials are widely used in high-tech fields because of their excellent performance. These materials will inevitably be damaged during use. Both macroscopic damage and microscopic damage will lead to a decrease in the mechanical properties of the material, reduce the service life, and even cause unpredictable losses. Although the traditional artificial repair techniques such as glue patching and resin injection can repair the cracks or other macro damages on the surface of composite materials and play a certain role in maintaining the performance of the material, the damage that occurs inside the material, especially the early damage, is often It is difficult to detect with the naked eye or ...

Claims

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Application Information

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IPC IPC(8): B29C70/30D04H1/728
CPCB29C70/30D04H1/728
Inventor 尚枝郭靖汪东赵宁董海侠徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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